package cn.lxinet.lfs.utils;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;


@Component
public class SpringContextUtil implements ApplicationContextAware {
	/**
	 * 上下文对象实例
	 */
	private static ApplicationContext applicationContext;
	@Autowired
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		this.applicationContext = applicationContext;
	}

	/**
	 * 获取applicationContext
	 * @return
	 */
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	/**
	 * 通过name获取 Bean.
	 * @param name 参数传入要获取的实例的类名 首字母小写，这是默认的
	 * @return
	 */
	public static Object getBean(String name){
		return getApplicationContext().getBean(name);
	}

	/**
	 * 通过class获取Bean.
	 * @param clazz
	 * @param <T>
	 * @return
	 */
	public static <T> T getBean(Class<T> clazz){
		return getApplicationContext().getBean(clazz);
	}

	/**
	 * 通过name,以及Clazz返回指定的Bean
	 * @param name
	 * @param clazz
	 * @param <T>
	 * @return
	 */
	public static <T> T getBean(String name,Class<T> clazz){
		return getApplicationContext().getBean(name, clazz);
	}
}